螺旋式旋流器的切向速度分析  

ANALYSIS OF TANGENTIAL VELOCITY IN A SPIRAL CYCLONE

作　　者：吴剑华[1] 闫星峰[1] 王宗勇[1] 

机构地区：[1]沈阳化工学院机械工程学院,沈阳110142

出　　处：《环境工程》2009年第3期68-71,共4页Environmental Engineering

基　　金：国家"十五"科技攻关项目(2004BA319B1)

摘　　要：借助CFD软件,采用RSM模型对螺旋式旋流器内的切向速度场进行了数值模拟。模拟结果表明:旋流器内部的流场分为螺旋通道内的准自由涡和内筒区域的准强制涡;在柱锥交界区域的内筒外壁附近有一低速区,易导致颗粒富集而出现高浓度区进而影响分离效率;此外通过改变入口速度和螺旋通道的螺距,研究对旋流器切向速度的影响。通过对流场特性的研究,为进一步充分认识此类旋流器的分离机理提供了依据。The internal tangential velocity field in a spiral cyclone was simulated using commercial CFD software and the Reynolds stress model. The simulated results indicated that the internal flow field in a spiral cyclone could be divided into two parts： the spiral channel is the norm free vortex and the central area is the forced vortex. There exists a much lower velocity spot, which may affect the separation efficiency. Furthermore, the effects of inlet velocity and helical pitch of the spiral channel on the tangential velocity were presented. The research on the characteristics of flow field provided the evidence for further understanding of a spiral cyclone flow field and separation mechanism.

关 键 词：螺旋式旋流器 雷诺应力模型 切向速度 

分 类 号：TQ051.8[化学工程]